multi.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Mutiplication Table</title>
<script>
function check(){
var num = document.getElementById("num");
if(num.value == ""){
alert("Choose one table.");
return false;
}
}
</script>
</head>
<body>
<h2>Choose one table from the box. </h2>
<form method=post action="gugu.jsp" onSubmit="return check()">
<select name="num" id="num">
<option value="">Select</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
<option value="9">9</option>
</select>
<p>
<input type="submit" value="Click to view">
</form>
</body>
</html>gugu.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%
int num = Integer.parseInt(request.getParameter("num"));
out.println("<h2>"+num+" Times table</h2>");
for (int i = 1; i <= 9; i++) {
out.println(num+" * "+i+" = "+num*i+"<br>");
}
%>
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